Quote:
Originally Posted by psalt
Hello JP,
This usually means the mixture is too lean, the idle speed too low, or if you have a vacuum retard distributor, the timing is too retarded
The thing to remember about the cold start valve, is that it is out of the equation when you release the key from the start position. It has nothing to do with cold running. On later SC models, it is almost always the retard kicking in and causing the stumble. One of the faults with CIS is it was calibrated for a new engine and as the engine wears, there is less vacuum and more vacuum leaks, which result in less air plate deflection and a weaker mixture at idle. I would check the timing, check for vacuum leaks at the injectors with propane (wiggle them), then try a richer mixture.
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Thanks. I'm guessing you are right.. I am too lean. Thanks for pointing out that the cold start injector only fires during starter rotation.. I didnt know that. So thats is certainly not it.
I think between control pressure and mixture I'll get it. Last year I adjusted my WUR without guages.. took a lot of time but my gauges were in a moving truck at the time.. so Im gonna check that and make sure I got it right.. I just dont want to do anything that will change the driveability of the car which is absolutely perfect right now.. I mean it idles, and accelerates perfectly and is smooth as silk huming down any road in any gear.. I crap I just jinxed myself.